Square casserole



FIG. 1 is a perspective view a square casserole showing my new design therefor;

FIG. 2 is a top plan view thereof;

FIG. 3 is a right side elevational view thereof;

FIG. 4 is a front elevational view thereof; and,

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a square casserole, as shown and described. 